Chandigarh vs Vellore
Side-by-side air quality comparison between Chandigarh and Vellore.
Live AQI from Open-Meteo CAMS (~45 km global model, updated hourly). Multi-year history from CPCB station data via aqinow.co pipeline (2016–2024, station-level daily records).
AQI Comparison
Pollutant-level comparison (PM2.5, PM10, O3, NO2, SO2, CO)▾
| Pollutant | Chandigarh | Vellore |
|---|---|---|
| PM2.5(µg/m³) | 50.90 | 8.00 |
| PM10(µg/m³) | 66.80 | 10.00 |
| NO₂(µg/m³) | 44.60 | 11.40 |
| SO₂(µg/m³) | 8.10 | 4.50 |
| O₃(µg/m³) | 11.00 | 41.00 |
| CO(µg/m³) | 714.00 | 175.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Chandigarh averaged an AQI of 153 while Vellore averaged 61 — a 92-point (151%) gap, with Chandigarh the more polluted and Vellore the cleaner of the two. On 303 days when both cities reported, Vellore was cleaner on 299 of them; the average daily gap was 116 AQI points.
Seasonality & days
Chandigarh peaks in January, while Vellore peaks in December. Chandigarh logged 0.3% Severe days and 39.9% Good-or-Satisfactory days; Vellore was 0% Severe and 83.5% Good-or-Satisfactory. Longest clean-air streaks: Chandigarh 92 days, Vellore 23 days.
Year-over-year progress
Chandigarh has worsened by 27 AQI points (21.4%) from 2019 to 2024; Vellore has improved by 10 AQI points (14.1%) over the same window. The worst recorded day for Chandigarh reached AQI 452 at Sector-53 (CPCC) on 2022-11-09; Vellore hit AQI 245 at Vasanthapuram (TNPCB) on 2024-01-14.
Station-level disparity
Chandigarh spans 3 CPCB stations with a 43-point spread (min 107, max 150); Vellore spans 1 stations with a 0-point spread (min 70, max 70).
Verdict
🏆 Vellore has better air quality with an AQI of 13 compared to Chandigarh's 85. That's a significant difference of 72 points.